From patchwork Fri Dec 8 00:16:57 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Michael Chan X-Patchwork-Id: 13484499 X-Patchwork-Delegate: kuba@kernel.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=broadcom.com header.i=@broadcom.com header.b="MF1XSYFb" Received: from mail-oo1-xc33.google.com (mail-oo1-xc33.google.com [IPv6:2607:f8b0:4864:20::c33]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 3B48819A6 for ; Thu, 7 Dec 2023 16:17:28 -0800 (PST) Received: by mail-oo1-xc33.google.com with SMTP id 006d021491bc7-59063f8455eso737920eaf.3 for ; Thu, 07 Dec 2023 16:17:28 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=broadcom.com; s=google; t=1701994647; x=1702599447; darn=vger.kernel.org; h=mime-version:references:in-reply-to:message-id:date:subject:cc:to :from:from:to:cc:subject:date:message-id:reply-to; bh=SdEmXiUuGSvk53hT7HIMfcR2WNZz4YIJetYDUMOmDbs=; b=MF1XSYFbFt+ZkgH962RdZzqox07ZLOPIuVcWK2B8VQj/BpCzsc+ZGVUXT1WrHN7MS7 1412dG1FETZWSLyunW+Z4ZrApXw/XThsYqz9DeT6Mgc6n3KdLeQGdf8gtedB813rJCul kl1Kp6FzfVvFJf90YKi6KpyNTuQFskkLETT/w= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1701994647; x=1702599447; h=mime-version:references:in-reply-to:message-id:date:subject:cc:to :from:x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=SdEmXiUuGSvk53hT7HIMfcR2WNZz4YIJetYDUMOmDbs=; b=X15XWMDk6cAmdN8PDordGkBt2ThORwHihUDe5MUdE+W1mlMNPFWzh6FGGBUp6AxYEW +VWi68y5A8yt65YfwFPWf0mtLiNhmyFEUUyRrUkZTkhp1qVs/gAWEwwYwKOoReRmGpKD jYFxDR5SNDZ75z2lNEcjJrPdhGbSqFsq5aLsJ9Z8PrFVeBuIzDOuPFFGfUFTRuKuf44E inV1ASxyOcKrSrS3w27kJ4aPl3zhCkhgYZV4RLCN/853YIa2Anes2MHmcG13vALjo6oF 4HChgNHVC/gAx9KpavWPHFLR+1SjVRlDQnHYW9hSB1vU9JYh7MccgCYyL8Gn2TvZOgst NoaA== X-Gm-Message-State: AOJu0Yx2bPKz1dGnV+YxdTRCaGMK9ZVOE92Anyxj01O3/gLfAPRYwnsu asdHDE2Uv9Er5b/zjnSt/xSFoA== X-Google-Smtp-Source: AGHT+IFo6lCv6S3pDnlc9JNgBsXUZ9BSaVmZFNvKmlH1xdp5oPy+XpAqJOfQMuaIGkaZQG555ID5fQ== X-Received: by 2002:a05:6358:882c:b0:170:17eb:203e with SMTP id hv44-20020a056358882c00b0017017eb203emr3848445rwb.39.1701994647050; Thu, 07 Dec 2023 16:17:27 -0800 (PST) Received: from lvnvda5233.lvn.broadcom.net ([192.19.161.250]) by smtp.gmail.com with ESMTPSA id o4-20020a056a0015c400b006cdd369e3d0sm356493pfu.201.2023.12.07.16.17.25 (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Thu, 07 Dec 2023 16:17:25 -0800 (PST) From: Michael Chan To: davem@davemloft.net Cc: netdev@vger.kernel.org, edumazet@google.com, kuba@kernel.org, pabeni@redhat.com, gospo@broadcom.com, Kalesh AP , Andy Gospodarek , Vikas Gupta , Somnath Kotur Subject: [PATCH net v3 3/4] bnxt_en: Fix wrong return value check in bnxt_close_nic() Date: Thu, 7 Dec 2023 16:16:57 -0800 Message-Id: <20231208001658.14230-4-michael.chan@broadcom.com> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20231208001658.14230-1-michael.chan@broadcom.com> References: <20231208001658.14230-1-michael.chan@broadcom.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Patchwork-Delegate: kuba@kernel.org From: Kalesh AP The wait_event_interruptible_timeout() function returns 0 if the timeout elapsed, -ERESTARTSYS if it was interrupted by a signal, and the remaining jiffies otherwise if the condition evaluated to true before the timeout elapsed. Driver should have checked for zero return value instead of a positive value. MChan: Print a warning for -ERESTARTSYS. The close operation will proceed anyway when wait_event_interruptible_timeout() returns for any reason. Since we do the close no matter what, we should not return this error code to the caller. Change bnxt_close_nic() to a void function and remove all error handling from some of the callers. Fixes: c0c050c58d84 ("bnxt_en: New Broadcom ethernet driver.") Reviewed-by: Andy Gospodarek Reviewed-by: Vikas Gupta Reviewed-by: Somnath Kotur Signed-off-by: Kalesh AP Signed-off-by: Michael Chan --- v3: Log a warning for -ERESTARTSYS and do not return error code to caller. v2: Add missing SoB tag. --- drivers/net/ethernet/broadcom/bnxt/bnxt.c | 13 +++++++------ drivers/net/ethernet/broadcom/bnxt/bnxt.h | 2 +- .../net/ethernet/broadcom/bnxt/bnxt_devlink.c | 11 ++--------- .../net/ethernet/broadcom/bnxt/bnxt_ethtool.c | 19 ++++--------------- drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.c | 5 ++--- 5 files changed, 16 insertions(+), 34 deletions(-) diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.c b/drivers/net/ethernet/broadcom/bnxt/bnxt.c index b4a5311bdeb5..aa1f5b776b5a 100644 --- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c +++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c @@ -10732,10 +10732,8 @@ static void __bnxt_close_nic(struct bnxt *bp, bool irq_re_init, bnxt_free_mem(bp, irq_re_init); } -int bnxt_close_nic(struct bnxt *bp, bool irq_re_init, bool link_re_init) +void bnxt_close_nic(struct bnxt *bp, bool irq_re_init, bool link_re_init) { - int rc = 0; - if (test_bit(BNXT_STATE_IN_FW_RESET, &bp->state)) { /* If we get here, it means firmware reset is in progress * while we are trying to close. We can safely proceed with @@ -10750,15 +10748,18 @@ int bnxt_close_nic(struct bnxt *bp, bool irq_re_init, bool link_re_init) #ifdef CONFIG_BNXT_SRIOV if (bp->sriov_cfg) { + int rc; + rc = wait_event_interruptible_timeout(bp->sriov_cfg_wait, !bp->sriov_cfg, BNXT_SRIOV_CFG_WAIT_TMO); - if (rc) - netdev_warn(bp->dev, "timeout waiting for SRIOV config operation to complete!\n"); + if (!rc) + netdev_warn(bp->dev, "timeout waiting for SRIOV config operation to complete, proceeding to close!\n"); + else if (rc < 0) + netdev_warn(bp->dev, "SRIOV config operation interrupted, proceeding to close!\n"); } #endif __bnxt_close_nic(bp, irq_re_init, link_re_init); - return rc; } static int bnxt_close(struct net_device *dev) diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.h b/drivers/net/ethernet/broadcom/bnxt/bnxt.h index e702dbc3e6b1..0488b0466015 100644 --- a/drivers/net/ethernet/broadcom/bnxt/bnxt.h +++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.h @@ -2375,7 +2375,7 @@ int bnxt_open_nic(struct bnxt *, bool, bool); int bnxt_half_open_nic(struct bnxt *bp); void bnxt_half_close_nic(struct bnxt *bp); void bnxt_reenable_sriov(struct bnxt *bp); -int bnxt_close_nic(struct bnxt *, bool, bool); +void bnxt_close_nic(struct bnxt *, bool, bool); void bnxt_get_ring_err_stats(struct bnxt *bp, struct bnxt_total_ring_err_stats *stats); int bnxt_dbg_hwrm_rd_reg(struct bnxt *bp, u32 reg_off, u16 num_words, diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt_devlink.c b/drivers/net/ethernet/broadcom/bnxt/bnxt_devlink.c index f302dac56599..89809f1b129c 100644 --- a/drivers/net/ethernet/broadcom/bnxt/bnxt_devlink.c +++ b/drivers/net/ethernet/broadcom/bnxt/bnxt_devlink.c @@ -449,15 +449,8 @@ static int bnxt_dl_reload_down(struct devlink *dl, bool netns_change, return -ENODEV; } bnxt_ulp_stop(bp); - if (netif_running(bp->dev)) { - rc = bnxt_close_nic(bp, true, true); - if (rc) { - NL_SET_ERR_MSG_MOD(extack, "Failed to close"); - dev_close(bp->dev); - rtnl_unlock(); - break; - } - } + if (netif_running(bp->dev)) + bnxt_close_nic(bp, true, true); bnxt_vf_reps_free(bp); rc = bnxt_hwrm_func_drv_unrgtr(bp); if (rc) { diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c b/drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c index f3f384773ac0..5f67a7f94e7d 100644 --- a/drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c +++ b/drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c @@ -165,9 +165,8 @@ static int bnxt_set_coalesce(struct net_device *dev, reset_coalesce: if (test_bit(BNXT_STATE_OPEN, &bp->state)) { if (update_stats) { - rc = bnxt_close_nic(bp, true, false); - if (!rc) - rc = bnxt_open_nic(bp, true, false); + bnxt_close_nic(bp, true, false); + rc = bnxt_open_nic(bp, true, false); } else { rc = bnxt_hwrm_set_coal(bp); } @@ -972,12 +971,7 @@ static int bnxt_set_channels(struct net_device *dev, * before PF unload */ } - rc = bnxt_close_nic(bp, true, false); - if (rc) { - netdev_err(bp->dev, "Set channel failure rc :%x\n", - rc); - return rc; - } + bnxt_close_nic(bp, true, false); } if (sh) { @@ -4042,12 +4036,7 @@ static void bnxt_self_test(struct net_device *dev, struct ethtool_test *etest, bnxt_run_fw_tests(bp, test_mask, &test_results); } else { bnxt_ulp_stop(bp); - rc = bnxt_close_nic(bp, true, false); - if (rc) { - etest->flags |= ETH_TEST_FL_FAILED; - bnxt_ulp_start(bp, rc); - return; - } + bnxt_close_nic(bp, true, false); bnxt_run_fw_tests(bp, test_mask, &test_results); buf[BNXT_MACLPBK_TEST_IDX] = 1; diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.c b/drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.c index f3886710e778..6e3da3362bd6 100644 --- a/drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.c +++ b/drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.c @@ -521,9 +521,8 @@ static int bnxt_hwrm_ptp_cfg(struct bnxt *bp) if (netif_running(bp->dev)) { if (ptp->rx_filter == HWTSTAMP_FILTER_ALL) { - rc = bnxt_close_nic(bp, false, false); - if (!rc) - rc = bnxt_open_nic(bp, false, false); + bnxt_close_nic(bp, false, false); + rc = bnxt_open_nic(bp, false, false); } else { bnxt_ptp_cfg_tstamp_filters(bp); }